Ritual site - holy well, Altaghaderry, Co. Donegal
Atop Holy Well Hill, straddling the border between Donegal and Derry, sits an ancient cairn that has served multiple purposes throughout its long history.
Ritual site - holy well, Altaghaderry, Co. Donegal
This mound of earth and stones rises one metre high and is encircled by an earthen bank, creating a monument that spans 15 metres in diameter. The summit location offers commanding views across the mountainous terrain, which likely contributed to its selection as a sacred site by our ancestors.
Just west of the cairn’s highest point, archaeologists have documented a stone slab-lined grave measuring 1.5 metres north to south and 0.85 metres east to west. The burial chamber shows signs of structural stress, with its stone lining tilting inward due to pressure from the cairn above. This grave, catalogued as DG047-002003, represents just one element of what appears to be a complex ritual landscape that has retained its spiritual significance through the centuries.
The site continues to hold religious importance for local communities, who regard it as a holy well despite its mountaintop location. A pile of stones crowning the cairn likely marks where surveyors once erected a trigonometrical station, adding a layer of more recent history to this ancient place. The entire monument, designated DG047-002002, stands as a testament to the enduring sacred nature of certain landscapes in Irish tradition, where prehistoric burial sites and Christian holy wells often occupy the same ground.





